Examine source code of Seashells 2

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#a37b46",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Seashells 2",
  "manifest_version": 2,
  "description": "Stock credit: <a rel=\"nofollow\" href=\"https://outgoing.prod.mozaws.net/v1/7cff77dadef8be0c6b569cc2cacd0767b0208ccfb3006f53780816a8e20efbf8/https%3A//pixabay.com/en/users/croisy-1670164/\">croisy\n</a>"
}